🚀 go-pugleaf

rpj@borland.com (Rich Johns) writes:

>Does anybody out there have a window class in which each instance
>of that class can have a different background color? I just can't believe
>such  a thing can be so hard. I mean, its easy to change the bg for the
>entire class, but how can it be done on an instance basis?

>I've tried SetBkColor(...) and I've tried WM_ERASEBKGND, niether of which
>work. There must be a way to do this. I just can't believe that something
>so obviously useful, is so obscure.

Hi!

I think the SetBkColor applies only to text displayed with TextOut (or
a similar function). I've used the WM_ERASEBKGND message in the following
way:

/*	Somewhere in the initialize section */

	hBrush = CreateSolidBrush( BackGroundColor ); /* RGB value */
	hOldBrush = SelectObject(hDC,hBrush);

/*	In window procedure */

	case WM_ERASEBKGND:
		{
		RECT ClipRct;
		GetClipBox((HDC)wParam,&ClipRct);
		FillRect((HDC)wParam,&ClipRct,hBrush);

		/* Return TRUE because we DID erase the background */

		return((LONG)TRUE);
		}
		break;

Fairly simple, I think.

Best regards

Niels Erik Holm
ICL DATA A/S (RC International)
Copenhagen, Denmark
neh@rci.dk